Electronic-control high-efficiency holographic grating made of polymer dispersed liquid crystal materials doped with nano metal and preparation method thereof

Abstract

The invention discloses an electronic-control high-efficiency holographic grating made of polymer dispersed liquid crystal materials doped with nano metal and a preparation method of the holographic grating. The preparation method comprises the following steps, uniformly mixing and heating polymer dispersed liquid crystal materials containing nano metal particle materials by an ultrasonic emulsification instrument under the light shading condition, standing for 24-48h in a dark room, then injecting the polymer dispersed liquid crystal materials into a liquid crystal box, and then arranging the packaged liquid crystal box at a holographic light field of a helium-cadmium laser for exposure to finally obtain the electronically-controlled high-efficiency holographic grating made of polymer dispersed liquid crystal materials doped with nano metal. In the steps, the polymer dispersed liquid crystal materials comprise the following components by weight: 0.1-0.2% of photoinitiator, 0.3-0.5% of coordinated initiator, 9-11% of cross linking agent, 9-10% of surface active agent, 0.1-0.2% of nano metal particles, 40-50% of polymers and 30-40% of nematic liquid crystal. According to the electronic-control high-efficiency holographic grating made of polymer dispersed liquid crystal materials doped with nano metal, the diffraction efficiency reaches up to 85%-95%, the response speed is less than 1ms, and the electro-optic properties are improved remarkably.

Description

technical field [0001] The invention belongs to the field of preparation of electro-optical functional materials, and in particular relates to an electronically controlled high-efficiency holographic grating of a polymer-dispersed liquid crystal material doped with nanometer metal and a preparation method thereof. Background technique [0002] As an electro-optic functional material, polymer-dispersed liquid crystal material is considered to be a new type of electro-optic material with broad application prospects due to its electrically controllable optical properties. Various new electro-optical devices of electronically controlled polymer dispersed liquid crystal technology, such as optical attenuators, electronically controlled zoom lenses, optical gain equalizers, and optical choppers, these devices are used in optical communication systems, optical imaging systems and measurement systems good utility. To this end, the key technology is the material and preparation tech...

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Problems solved by technology

[0003] In the common preparation process, the following problems are prone to occur, such as low diffraction efficiency, large loss, high driving voltage and long response time, etc.

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